Updating to OSSIM 4.1.3 causes ossim-agent not to start

On updating OSSIM via the update the ossim-agent starts and then stops. No logs are parsed and both /var/log/ossim/agent.log and /var/log/ossim/agent_error.log are empty or contain old information. Listing the processes shows that the agent is not running.

When the agent is started manually using

/usr/bin/ossim-agent -v

the following error is logged:

OSError: [Errno 2] No such file or directory: '/etc/ossim/agent/host_cache_pro.dic

Looking in the /etc/ossim/agent directory there is no host_cache_pro.dic file but there is a host_cache.dic.

To fix, rename the host_cache.dic to host_cache.dic.old and restart the ossim-agent.